Home / 5,121.81-7,681.10-1,834.70

Finding the Fourth Proportional to 5,121.81, 7,681.10 and 1,834.70

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Solution

The fourth proportional to 5,121.81, 7,681.10 and 1,834.70 is: 2,751.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.81 : 7,681.10 = 1,834.70 : x
  2. Step 2: Convert to fraction form
    5,121.81/7,681.10 = 1,834.70/x
  3. Step 3: Cross multiply
    5,121.81x = 7,681.10 × 1,834.70
  4. Step 4: Simplify right side
    5,121.81x = 14,092,466.59
  5. Step 5: Solve for x
    x = 14,092,466.59/5,121.81
  6. Step 6: Final answer
    x = 2,751.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.